Publicité
Danger!
Risk of death caused by fire or explosion
if there is a leak in the refrigerant circuit!
The product contains the combustible refri-
gerant R32. In the event of a leak, escaping
refrigerant may mix with air to form a flam-
mable atmosphere. There is a risk of fire and
explosion. In the event of a fire, toxic or cor-
rosive substances, such as carbonyl fluoride,
carbon monoxide or hydrogen fluoride, are
produced.
▶
Inspect the area around the product. En-
sure that there are no combustion or igni-
tion risks. Put up "No Smoking" signs.
▶
If you are working on the product when it
is open, before starting work, use a gas
sniffer that is free of ignition sources to
ensure that there is no leak.
▶
If you notice a leak, close the product's
housing, inform the end user and notify
customer service.
▶
Keep all ignition sources away from the
product. Ignition sources are, for example,
open flames, hot surfaces with temper-
atures above 550 °C, electrical devices
or tools that are not free from electrical
sources, or static discharges.
▶
Ensure that the room is sufficiently aer-
ated around the product for the entire time
that work is carried out on the product.
The aeration must safely dissolve dis-
placed refrigerant and, preferably, divert
it outside into the atmosphere.
▶
Use a restriction to ensure that unauthor-
ised personnel are kept away from the
product.
Danger!
Risk of death from electric shock when
opening the electronics box!
Capacitors are installed in the product's
electronics box. Even after switching off the
power supply, residual voltage is still present
in electrical components for 60 minutes.
▶
Only open the electronics box after a wait-
ing period of 60 minutes.
▶
Switch off the disconnector to which the product is con-
nected in the building.
▶
Disconnect the product from the power supply but ensure
that the product is still earthed.
▶
Secure the product against being switched back on
again.
▶
Close the service valves in the heating flow and in the
heating return.
▶
Close the service valve in the cold water pipe.
▶
Wear suitable personal protective equipment and bring a
fire extinguisher with you.
234
▶
Use only safe units and tools that are permitted for R32
refrigerant.
▶
Monitor the atmosphere in the working area using a gas
detector that is positioned close to the floor.
▶
Remove all ignition sources, e.g. tools that are not spark-
free.
▶
Take protective measures to prevent static discharges.
▶
If there is a leak that requires a soldering process, re-
move all of the refrigerant from the system, or isolate it
(using isolation valves) in an area of the system that is
removed from the leak.
▶
Drain the product if you want to replace water-carrying
components of the product.
▶
Ensure that water does not drip on live components (e.g.
the electronics box).
▶
Use only new seals.
▶
Remove the casing sections.
12.2
Safety cut-out
The product has a safety cut-out.
If the safety cut-out has tripped, the cause must be elimin-
ated and the safety cut-out replaced.
▶
See the "Fault codes" table in the appendix.
Fault codes (→ Page 258)
▶
Check the back-up heater for damage due to overheat-
ing.
▶
Check that the power supply for the power supply PCB is
working properly.
▶
Check the cabling for the power supply PCB.
▶
Check the cabling for the back-up heater.
▶
Check that all temperature sensors are working properly.
▶
Check that all other sensors are working properly.
▶
Check the pressure in the heating circuit.
▶
Check that the heating circuit pump is working properly.
▶
Check whether there is air in the heating circuit.
Installation and maintenance instructions 8000017440_FT
Publicité
